Malicious PDF — malware analysis report

Static analysis result for SHA-256 60037d231dcaaf67…

MALICIOUS

PDF

65.7 KB Created: 2020-11-17 16:41:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 8f8fadf9a29a27ae8893e424920a706f SHA-1: e8476acbc3a710d0ee0c1f0fe4baebbebfb7bca4 SHA-256: 60037d231dcaaf67c1e200a86c57c924b4ac07880aba5d279c4460b9f2b012ce
214 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, with at least one identified as a malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of a link farm suggests an attempt to manipulate search engine results or distribute malware through a large number of external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://traffine.ru/123?utm_term=emotional+abuse+quotes+sayings In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366366/normal_5f8f92fe9a8db.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454825/normal_5fac297d0d9b7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372072/normal_5f8a5834c80ab.pdfIn PDF document text
    • https://gakupimofol.weebly.com/uploads/1/3/4/5/134583622/misawikovizut-suguviwevobeni-nujibog-memimewuraxagil.pdfIn PDF document text
    • https://dawugagulinejud.weebly.com/uploads/1/3/4/3/134368664/4106226.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420592/normal_5f9d4b74cbd81.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423453/normal_5f9e0671e8551.pdfIn PDF document text
    • https://kuxunudizovisaj.weebly.com/uploads/1/3/4/3/134321976/bewevariwemefa-mobisugo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468255/normal_5faa0a85dbbb7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/turip/language_in_czech_republic_translation.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/91286817264.pdfIn PDF document text
    • https://s3.amazonaws.com/jaburirarov/chapter_4_study_guide_physics_answers.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c73e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC73E 5236 bytes
SHA-256: 2e39db9a9ee0a6aaa847941fddf351a3fc495fa744e5a12637cec8b652f25243
font_01_sfnt_off0000d902.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD902 9836 bytes
SHA-256: 26fcfb20c1ba4e86428841c399a60099c6ccafd187a9c4705de9d0662ff79112

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